Long-distance 2D polarized photoelectric autocollimation device and method for drift quantity returned from feedback of target drone

A photoelectric self-collimation, two-dimensional polarization technology, applied in measurement devices, optical devices, instruments, etc., can solve the problems of angle measurement deviation, inability to introduce feedback control, and difficulty in further improving measurement uncertainty, avoiding angle The effect of the amount of drift

Inactive Publication Date: 2006-04-19
严格集团股份有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] In practical application, it can be seen that although the above measurement scheme suppresses the angular drift of the beam to a certain extent, the above measurement scheme is only aimed at the application of a specific laser line reference, and the control object is the center position of the laser beam
However, in the practical application of two-dimensional photoelectric autocollimator, especially in long-distance applications, it is required to introduce feedback control to measure the angular drift of the beam while accurately measuring the two-dimensional small angle change. Due to the high-resolution characteristics of the two-dimensional photoelectric autocollimator, the influence of the angular drift caused by the feedback of the laser beam to the laser light source cannot be ignored. The difficulty is that the object of feedbac

Method used

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  • Long-distance 2D polarized photoelectric autocollimation device and method for drift quantity returned from feedback of target drone
  • Long-distance 2D polarized photoelectric autocollimation device and method for drift quantity returned from feedback of target drone
  • Long-distance 2D polarized photoelectric autocollimation device and method for drift quantity returned from feedback of target drone

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Embodiment 1

[0070] like figure 1 In the shown two-dimensional polarized photoelectric self-collimation device, the polarized laser light source 2 in the two-dimensional photoelectric self-collimation light pipe 1 emits a linearly polarized laser beam, λ / 4 The wave plate 5 is placed between the polarizing beam splitter 4 and the collimating objective lens 7; the spectroscopic target detector 12 is as Figure 6 As shown, it is composed of two right-angle prisms 19 and 20 placed oppositely, wherein a vertical working surface of a right-angle prism 20 is coated with a spectroscopic film, and the measuring beam is incident on the vertical working surface of the right-angled prism 20 coated with a spectroscopic film; the drift amount monitoring device 8 is composed of a deflection mirror 11, a focusing objective lens 10 and a four-quadrant detector 9 fixedly connected. First, the two-dimensional photoelectric self-collimating light tube 1 is adjusted, and the polarization direction of the l...

Embodiment 2

[0083] like figure 1 The two-dimensional polarized photoelectric self-collimation device shown here, as Figure 5 As shown, the polarized laser light source 2 in the two-dimensional photoelectric self-collimating light pipe 1 emits a linearly polarized laser beam, and λ / 4 The wave plate 5 is placed between the collimating objective lens 7 and the spectroscopic target detector 12 . Other components and working principles of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0085] like figure 1 As shown in the two-dimensional polarized photoelectric self-collimation device, here, as shown in FIG. 7 , the polarized laser light source 2 in the two-dimensional photoelectric self-collimation light pipe 1 emits a circularly polarized laser beam. Other components and working principles of this embodiment are the same as those of Embodiment 1.

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Abstract

Combination of polarized laser source, polarized beam splitter mirror and quarter Lambda wave plate is adopted in the 2D photoelectric autocollimation tube, which uses characteristic of polarization to avoid that measuring light beam feeds back laser source so as to prevent further angle drift of the measuring light. Obtaining measurement signal of 2D variance in small angle, beam splitter type target detector also obtains angle drift component of separated and fed back light beam. The said component is identical to inherent component of laser source. Monitoring device monitors quantity of angle drift. Based on quantity of angle drift obtained, computer control 2D optical beam deflection device in real time to adjust the measuring light beam according to direction opposite to quantity of angle drift. The invention restrains and eliminates quantity of angle drift coupled in measuring light beam in propagation path of the measuring light beam.

Description

technical field [0001] The invention belongs to the technical field of precision instrument manufacturing and precision testing and measurement, and in particular relates to a long-distance high-precision two-dimensional polarized photoelectric self-collimation device and method for feedback of a drift target. Background technique [0002] With the continuous improvement and improvement of measurement technology, the development of modern high-precision measurement technology and azimuth targeting and tracking system has put forward higher and higher requirements for the measurement accuracy of small angles. Photoelectric autocollimator plays an irreplaceable role in small-angle precision measurement, high-precision aiming and positioning. It can be used as a component of optical measuring instruments such as goniometers and optical comparators, and can also be used alone in measuring instruments for optical Measurement, assembly and adjustment of aerospace instruments and a...

Claims

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Application Information

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IPC IPC(8): G01B11/26
Inventor 谭久彬敖磊崔继文金国良杨文国
Owner 严格集团股份有限公司
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